A renewed call for information is being made on the 45th anniversary of Columba McVeigh's disappearance.
In November 1975, the teenager from Donaghmore in Tyrone was abducted, murdered and secretly buried.
It's believed his remains are in bogland near Bragan, however a number of thorough searches in the area have been unsuccessful.
Speaking to Shannonside Northern Sound News, Oliver McVeigh made an appeal for anyone with information to "let bygones be bygones" and come forward.